WO2020170711A1 - Dispositif d'affichage tête haute - Google Patents

Dispositif d'affichage tête haute Download PDF

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Publication number
WO2020170711A1
WO2020170711A1 PCT/JP2020/002406 JP2020002406W WO2020170711A1 WO 2020170711 A1 WO2020170711 A1 WO 2020170711A1 JP 2020002406 W JP2020002406 W JP 2020002406W WO 2020170711 A1 WO2020170711 A1 WO 2020170711A1
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WO
WIPO (PCT)
Prior art keywords
glass plate
glass
light
mass
projection
Prior art date
Application number
PCT/JP2020/002406
Other languages
English (en)
Japanese (ja)
Inventor
直也 森
健介 泉谷
洋貴 中村
Original Assignee
セントラル硝子株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by セントラル硝子株式会社 filed Critical セントラル硝子株式会社
Priority to JP2021501749A priority Critical patent/JP7328575B2/ja
Priority to EP20759650.3A priority patent/EP3895928B1/fr
Priority to CN202080012302.4A priority patent/CN113365868A/zh
Priority to US17/431,619 priority patent/US20220050289A1/en
Publication of WO2020170711A1 publication Critical patent/WO2020170711A1/fr

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B17/00—Layered products essentially comprising sheet glass, or glass, slag, or like fibres
    • B32B17/06—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material
    • B32B17/10—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin
    • B32B17/10005—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing
    • B32B17/10009—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing characterized by the number, the constitution or treatment of glass sheets
    • B32B17/10036—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing characterized by the number, the constitution or treatment of glass sheets comprising two outer glass sheets
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/01—Head-up displays
    • G02B27/0101—Head-up displays characterised by optical features
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B17/00—Layered products essentially comprising sheet glass, or glass, slag, or like fibres
    • B32B17/06—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material
    • B32B17/10—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin
    • B32B17/10005—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing
    • B32B17/10009—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing characterized by the number, the constitution or treatment of glass sheets
    • B32B17/10036—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing characterized by the number, the constitution or treatment of glass sheets comprising two outer glass sheets
    • B32B17/10045—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing characterized by the number, the constitution or treatment of glass sheets comprising two outer glass sheets with at least one intermediate layer consisting of a glass sheet
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B17/00—Layered products essentially comprising sheet glass, or glass, slag, or like fibres
    • B32B17/06—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material
    • B32B17/10—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin
    • B32B17/10005—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing
    • B32B17/10009—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing characterized by the number, the constitution or treatment of glass sheets
    • B32B17/10082—Properties of the bulk of a glass sheet
    • B32B17/1011—Properties of the bulk of a glass sheet having predetermined tint or excitation purity
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B17/00—Layered products essentially comprising sheet glass, or glass, slag, or like fibres
    • B32B17/06—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material
    • B32B17/10—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin
    • B32B17/10005—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing
    • B32B17/10165—Functional features of the laminated safety glass or glazing
    • B32B17/10431—Specific parts for the modulation of light incorporated into the laminated safety glass or glazing
    • B32B17/1044—Invariable transmission
    • B32B17/10458—Polarization selective transmission
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B17/00—Layered products essentially comprising sheet glass, or glass, slag, or like fibres
    • B32B17/06—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material
    • B32B17/10—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin
    • B32B17/10005—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing
    • B32B17/1055—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing characterized by the resin layer, i.e. interlayer
    • B32B17/10559—Shape of the cross-section
    • B32B17/10577—Surface roughness
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B17/00—Layered products essentially comprising sheet glass, or glass, slag, or like fibres
    • B32B17/06—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material
    • B32B17/10—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin
    • B32B17/10005—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing
    • B32B17/1055—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing characterized by the resin layer, i.e. interlayer
    • B32B17/10761—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing characterized by the resin layer, i.e. interlayer containing vinyl acetal
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K35/00—Instruments specially adapted for vehicles; Arrangement of instruments in or on vehicles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K35/00—Instruments specially adapted for vehicles; Arrangement of instruments in or on vehicles
    • B60K35/20—Output arrangements, i.e. from vehicle to user, associated with vehicle functions or specially adapted therefor
    • B60K35/21—Output arrangements, i.e. from vehicle to user, associated with vehicle functions or specially adapted therefor using visual output, e.g. blinking lights or matrix displays
    • B60K35/23—Head-up displays [HUD]
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K35/00—Instruments specially adapted for vehicles; Arrangement of instruments in or on vehicles
    • B60K35/60—Instruments characterised by their location or relative disposition in or on vehicles
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
    • C03C27/00—Joining pieces of glass to pieces of other inorganic material; Joining glass to glass other than by fusing
    • C03C27/06—Joining glass to glass by processes other than fusing
    • C03C27/10—Joining glass to glass by processes other than fusing with the aid of adhesive specially adapted for that purpose
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
    • C03C3/00—Glass compositions
    • C03C3/04—Glass compositions containing silica
    • C03C3/076—Glass compositions containing silica with 40% to 90% silica, by weight
    • C03C3/083—Glass compositions containing silica with 40% to 90% silica, by weight containing aluminium oxide or an iron compound
    • C03C3/085—Glass compositions containing silica with 40% to 90% silica, by weight containing aluminium oxide or an iron compound containing an oxide of a divalent metal
    • C03C3/087—Glass compositions containing silica with 40% to 90% silica, by weight containing aluminium oxide or an iron compound containing an oxide of a divalent metal containing calcium oxide, e.g. common sheet or container glass
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/40—Properties of the layers or laminate having particular optical properties
    • B32B2307/42—Polarizing, birefringent, filtering
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2457/00—Electrical equipment
    • B32B2457/20—Displays, e.g. liquid crystal displays, plasma displays
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K2360/00—Indexing scheme associated with groups B60K35/00 or B60K37/00 relating to details of instruments or dashboards
    • B60K2360/20—Optical features of instruments
    • B60K2360/25—Optical features of instruments using filters
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K2360/00—Indexing scheme associated with groups B60K35/00 or B60K37/00 relating to details of instruments or dashboards
    • B60K2360/60—Structural details of dashboards or instruments
    • B60K2360/66—Projection screens or combiners
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K2360/00—Indexing scheme associated with groups B60K35/00 or B60K37/00 relating to details of instruments or dashboards
    • B60K2360/77—Instrument locations other than the dashboard
    • B60K2360/785—Instrument locations other than the dashboard on or in relation to the windshield or windows
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K2360/00—Indexing scheme associated with groups B60K35/00 or B60K37/00 relating to details of instruments or dashboards
    • B60K2360/92—Manufacturing of instruments
    • B60K2360/96—Manufacturing of instruments by assembling

Definitions

  • the present disclosure is mounted on a moving body such as a vehicle or an aircraft, and is a head-up display (hereinafter, may be referred to as HUD) that is projected on a projection unit in a front field of view of an occupant so that the occupant can visually recognize the image. ) Regarding the device.
  • HUD head-up display
  • a windshield installed in the front part of the moving body is used as the projection unit of the HUD device.
  • the occupant visually recognizes a virtual image based on the reflected image of the projection light on the projection unit.
  • the first reflection image may be formed on the indoor main surface and the second reflection image may be formed on the outdoor main surface, so that the virtual image may be visually recognized by the occupant as a double image.
  • Non-Patent Document 1 As a method of reducing this double image, a polarization HUD method has been proposed (Patent Documents 1, 2, 3, etc.).
  • the double image reduction of the polarization HUD method is performed by the following mechanism.
  • the projection unit a first transparent plate made of glass or the like arranged on the indoor side, a second transparent plate arranged on the outdoor side, the first transparent plate and the second transparent plate
  • the laminated member includes a half-wave plate disposed in between, and each material of the laminated member is adjusted to have the same refractive index in the visible light region. Then, the projection light is incident on the projection unit at a Brewster's angle.
  • the incident projection light is S-polarized light
  • the reflection image is formed on the indoor-side main surface of the first transparent plate.
  • the projection light passing through the projection unit is converted into P-polarized light.
  • the P-polarized light reaches the outdoor-side main surface of the second transparent plate, it is emitted to the outdoor side without being reflected by the main surface.
  • the occupant visually recognizes a virtual image formed on the indoor main surface of the first translucent plate based on the reflected image of S-polarized light.
  • This system is referred to as the S-HUD system.
  • Patent Document 2 proposes to use a yellowish half-wave plate in combination with a green glass plate in order to make the tint through the projection section natural to human vision. There is.
  • the projection unit is used as a windshield installed in the front part of the moving body, it is preferable that the member used is colorless or nearly colorless. However, it has been found that the use of a colorless or nearly colorless half-wave plate may cause a double image problem.
  • the traveling direction of light is the Z axis when the X axis, the Y axis, and the Z axis are viewed in a certain space
  • the polarization is a combined vector of the polarized wave in the X axis direction and the polarized wave in the Y axis direction. It is formed.
  • polarized light travels through a medium, there is a difference between the polarized wave propagation speed in the X-axis direction and the polarized wave propagation speed in the Y-axis direction (a refractive index difference is representative of the difference).
  • the phases of both polarized waves are shifted, and the type of polarized light changes.
  • the S-polarized light When the light incident on the medium is S-polarized light and the phases of the polarized light in the X-axis direction and the polarized light in the Y-axis direction are shifted by a half wavelength in the medium, the S-polarized light is rotated by 90 degrees, and P It becomes polarized light.
  • a factor that affects the propagation speed of polarized waves, represented by a refractive index, is wavelength dispersion.
  • the “difference” between the factor on the X axis and the factor on the Y axis is constant in a certain light wavelength range, the polarized light incident on the medium is always the same polarized light in the light wavelength range. Is converted to.
  • the half-wave plate is colored yellow like the half-wave plate described in Patent Document 2, a part of the blue color is absorbed in the half-wave plate, so that the S-polarized light is changed to the P-polarized light.
  • the phenomenon of not being converted cannot be recognized as a problem by those skilled in the art.
  • the half-wave plate is colorless or nearly colorless, a region where conversion from S-polarized light to P-polarized light is likely to occur easily means that a HUD device using a half-wave plate that is colorless or nearly colorless is used. Need to be considered as a new issue.
  • the present disclosure provides a HUD device that improves a double image in a HUD device of the S-HUD method when the half-wave plate is colorless or nearly colorless.
  • the task is to do.
  • the head-up display device of the present disclosure is a head-up display device that is mounted on a moving body and that allows an occupant of the moving body to visually recognize a virtual image based on a reflected image of an S-polarized light projection unit,
  • the head-up display device An image section for irradiating projection light composed of S-polarized light, A projection unit onto which the projection light is projected,
  • the projection unit a first glass plate arranged on the incident side of the projection light, a second glass plate arranged on the emission side of the projection light, the first glass plate, and the second glass plate Made of laminated glass, which is provided with a half-wave plate,
  • the first glass plate and the second glass plate in the composition, consisting of a glass composition containing a silicon oxide, an iron oxide, and an alkali metal oxide, At least one of the first glass plate and the second glass plate,
  • the thickness is 0.3 mm to 3 mm
  • the total iron oxide content converted to Fe 2 O 3 in the glass composition is 0.2% by mass to
  • the half-wave plate has visible light transparency, and a * of transmitted light in the CIE color system of the half-wave plate is ⁇ 2.5 to 4.5 and b * is ⁇ 1.0 to 7.0.
  • the reflection image is formed on the indoor side surface of the first glass plate, It is a head-up display device in which projection light converted into P-polarized light is emitted from the outdoor side surface of the second glass plate.
  • the half-wave plate has visible light transparency and a * of transmitted light in the CIE color system is ⁇ 2.5 to 4.5 and b * is ⁇ 1.0 to 7.0, The color tone is visually recognized as colorless or nearly colorless. Therefore, it is advantageous to use the projection unit as a window of the moving body.
  • at least one of the first glass plate and the second glass plate has a total iron oxide content of 0.2 mass% to 2.0 mass% converted to Fe 2 O 3 in the glass composition, FeO
  • the content By setting the content to be 0.1% by mass to 0.5% by mass, the light in the wavelength range with low conversion efficiency of converting the S-polarized light into the P-polarized light of the half-wave plate is converted into the glass plate. Can be absorbed and the double image in the HUD device can be improved.
  • a double image can be improved in a HUD device of the S-HUD system.
  • the projection unit used in the S-HUD system can have a neutral color tone for the occupant, and the projection unit can be preferably used as a window of the moving body.
  • FIG. 1 is a schematic diagram showing an outline of a HUD device according to an embodiment of the present invention and an optical path in the device.
  • FIG. 1 is a schematic diagram showing an outline of a HUD device according to an embodiment of the present invention and an optical path in the device.
  • the optical path of the projection light is shown by a solid line
  • the optical path of the projection light that causes a double image is shown by a dotted line.
  • a virtual image 521 as a double image is also shown by a dotted line.
  • the projection unit 4 includes a half-wave plate 44 and a first glass plate 41 that is arranged to face the half-wave plate 44 and that is arranged on the indoor side of the moving body and the outdoor side of the moving body.
  • a second glass plate 42 disposed in the.
  • An intermediate film 431 is sandwiched between the half-wave plate 44 and the first glass plate 41
  • an intermediate film 432 is sandwiched between the half-wave plate 44 and the second glass plate 42.
  • the first glass plate 41 includes a first main surface 411 exposed to the indoor side and a second main surface 412 opposite to the first main surface, and the second glass plate 42 is exposed to the outdoor side. It has a fourth main surface 424 and a third main surface 423 opposite to the fourth main surface 424.
  • the projection light 50 is applied to the first main surface 411 from the image section 3, and a first reflected image is formed on the first main surface 411.
  • the first main surface 411 is an inner surface of the first glass plate 41. Then, the occupant 6 observes the virtual image 511 on the extension of the optical path 51 based on the first reflection image.
  • the HUD device which is one of the embodiments of the present invention, is an S-HUD type HUD device that is optically designed to observe a virtual image based on the first reflection image.
  • the projection light is S-polarized light.
  • the projection light is S-polarized light, it does not necessarily mean that the projection light is S-polarized light at the time of the projection light from the image portion, and the light emitted as projection light including P-polarized light and S-polarized light from the image portion is It may be light converted into projection light composed of S-polarized light by a polarizer.
  • Examples of the projection light including P-polarized light and S-polarized light include those randomly containing all polarized light (non-polarized light), circularly polarized light or elliptically polarized light, mixed light of P-polarized light and S-polarized light, P-polarized light, and S-polarized light. There is no linearly polarized light.
  • the projection light including P-polarized light and S-polarized light can be converted into the projection light including S-polarized light.
  • switching to the S-HUD system is performed.
  • the polarizer has a transmission window for one linearly polarized light, and the transmission window is arranged so as to face the traveling direction of the projection light.
  • a projector capable of irradiating projection light composed of S-polarized light or projection light containing P-polarized light and S-polarized light is preferably used.
  • Examples of such a projector include a projector including a DMD projection system type projector, a laser scanning type MEMS projection system type projector, or a reflection type liquid crystal type projector.
  • the projection light composed of S-polarized light is incident on the first principal surface at the Brewster angle.
  • the angle of incidence of the S-polarized projection light on the projection unit may have a certain width around the incidence angle forming the Brewster angle.
  • the incident light can be incident at a Brewster's angle of about ⁇ 10°.
  • the projection light can be incident at an incident angle of 46° to 66°.
  • a reflection image is formed on the first main surface of the projection unit, and the occupant of the moving body visually recognizes a virtual image based on the reflection image on the first main surface.
  • the projection light transmitted through the first main surface and traveling in the projection unit is converted into P-polarized light by the half-wave plate, and the projection light remains P-polarized light without being reflected by the fourth main surface of the projection unit. It is discharged to the fourth main surface of the two glass plates, that is, the outdoor side. Therefore, a double image is prevented from occurring.
  • the projection unit is arranged between the first glass plate arranged on the incident side of projection light, the second glass plate arranged on the emission side of projection light, the first glass plate, and the second glass plate. And a half-wave plate.
  • the 1st glass plate and the 2nd glass plate consist of a glass composition which contains a silicon oxide, an iron oxide, and an alkali metal oxide in a composition.
  • the material of the glass plate is preferably soda lime silicate glass having a glass composition defined by ISO16293-1. In other words, soda lime silicate glass having a glass composition defined by ISO16293-1, which contains iron oxide in the composition, is preferable.
  • At least one of the first glass plate and the second glass plate has a thickness of 0.3 mm to 3 mm, and the total iron oxide content converted to Fe 2 O 3 in the glass composition is 0.2. % By mass and 2.0% by mass, and the FeO content is 0.1% by mass to 0.5% by mass.
  • Such glass is so-called green glass and has absorption around 400 nm. Therefore, by using such a glass as at least one of the glasses, it is possible to absorb light having a wavelength that causes a double image.
  • the total iron oxide content converted to Fe 2 O 3 in the glass composition is 0.2% by mass to 2.0% by mass, it is possible to absorb light having a wavelength that causes a double image.
  • the FeO content is 0.1% by mass to 0.5% by mass, the color tone of the glass changes from yellow to green, and the glass has a natural color tone.
  • one of the first glass plate and the second glass plate has a thickness of 0.3 mm to 3 mm, and the total iron oxide content converted to Fe 2 O 3 in the glass composition is 0% by mass to It is preferable that the content is 0.15% by mass and the FeO content is 0% by mass to 0.05% by mass.
  • Such glass is so-called clear glass. It is preferable that such clear glass is the first glass plate, that is, the glass plate arranged on the indoor side. By disposing the clear glass on the surface on the indoor side, the RGB of the virtual image based on the first reflection image can be made more natural.
  • the half-wave plate is arranged between the first glass plate and the second glass plate.
  • the half-wave plate may have a plate shape or a film shape.
  • polycarbonate, polyarylate, polyether sulfone, a retardation element obtained by uniaxially or biaxially stretching a plastic film such as a cycloolefin polymer, or a liquid crystal polymer is aligned in a specific direction to fix the alignment state.
  • a retardation element can be used.
  • a method of orienting the polymer for example, a method of rubbing a transparent plastic film such as a polyester film or a cellulose film, an alignment film is formed on a glass plate or a plastic film, and the alignment film is rubbed or optically aligned. There is a method for doing so.
  • a method for fixing the orientation for example, in the presence of a photopolymerization initiator, a UV-curable liquid crystal polymer is irradiated with UV rays to be cured by a polymerization reaction, a method of crosslinking by heating, or an orientation in a high temperature state. Examples include a method of quenching afterwards.
  • the compound used as the liquid crystal polymer is not particularly limited as long as it exhibits liquid crystallinity when aligned in a specific direction.
  • a main chain type liquid crystal polymer such as optically active polyester, polyamide, polycarbonate or polyesterimide
  • side chain type liquid crystal polymers such as acrylate, polymethacrylate, polymer funnel, polysiloxane, and polyether, and polymerizable liquid crystals.
  • a polymer composition in which other low molecular weight or high molecular weight optically active compound is added to these main chain type or side chain type polymers which are not optically active can be exemplified.
  • the half-wave plate has visible light transparency, and a * of transmitted light in the CIE color system of the half-wave plate is ⁇ 2.5 to 4.5 and b * is ⁇ 1.0 to 7.0. .. It is preferable that the half-wave plate has a visible light transmittance such that the visible light transmittance of the projection unit 4, that is, the visible light transmittance of the laminated glass is 70% or more.
  • the visible light transmittance of the half-wave plate may be 70% or more, or 80% or more.
  • the visible light transmittance here means that obtained by the method defined in JIS R3212 (2015).
  • a spectrophotometer (U-4100 manufactured by Hitachi, Ltd.) can be used as a measuring device for visible light transmittance.
  • the a * and b * of transmitted light can be calculated based on the method described in JIS Z8781-4 (2013) using the above visible light transmittance. It can be said that such a half-wave plate is a colorless or nearly colorless half-wave plate. Therefore, it is a half-wave plate having a preferable color to be used for the windshield installed in the front part of the moving body. In the half-wave plate, it is preferable that the wavelength range of light having the highest conversion rate from S-polarized light to P-polarized light is 500 nm to 600 nm.
  • the wavelength range of light with the highest conversion rate from S-polarized light to P-polarized light is in the range of 500 nm to 600 nm, there is an optical wavelength range with the highest conversion rate in the central range of visible light wavelengths.
  • the conversion from S-polarized light to P-polarized light is efficiently performed.
  • the light wavelength region having the highest conversion rate from S-polarized light to P-polarized light is located at the end of the visible light wavelength region, the conversion efficiency becomes poor at the other end of the visible light wavelength region.
  • the half-wave plate only needs to be arranged between the first glass plate and the second glass plate, and even if the half-wave plate is sandwiched between two interlayer films arranged between the first glass plate and the second glass plate. Good.
  • the number of intermediate films may be one, and the half-wave plate may be sandwiched between one glass plate and the intermediate film.
  • a resin intermediate film can be used as the intermediate film, and a thermoplastic transparent polymer is preferably used as the resin intermediate film.
  • a thermoplastic transparent polymer is preferably used as the resin intermediate film.
  • the polymer polyvinyl butyral (PVB), ethylene vinyl acetate (EVA), acrylic resin (PMMA), urethane resin, polyethylene terephthalate (PET), cycloolefin polymer (COP) and the like can be used.
  • the surface of the resin interlayer is subjected to uneven embossing so that devitrification and bubble defects due to poor degassing that occur during integrated processing into laminated glass do not occur.
  • a resin intermediate film that has been embossed can be used.
  • the resin intermediate film a partially colored one, a sandwich of a layer having a sound insulating function, and one having an inclined thickness can be used.
  • the resin interlayer film may be appropriately added with an ultraviolet absorber, an infrared absorber, an antioxidant, an antistatic agent, a heat stabilizer, a colorant, an adhesion modifier, and the like.
  • the resin intermediate film may be stretched by applying tension, or may be passed through between umbrella-shaped pressure rolls and deformed into a fan shape.
  • the air can be degassed by wrapping a laminate of a glass plate and a resin interlayer with a rubber bag made of heat-resistant rubber, or by sealing only the edge of the glass plate of the laminate with a rubber ring. Ring method and a roll method in which the laminate is passed between rolls and pressure is applied from both sides of the two outermost glass plates, and any method may be used.
  • the laminate is taken out of the rubber bag when the bag method is used and the rubber ring is removed from the laminate when the ring method is used. Then, the laminate is put into an autoclave, and pressure and heat are applied so that the pressure in the autoclave is 10 to 15 kg/cm 2 and the temperature is 120 to 150° C., and heating is performed for 20 to 40 minutes under these conditions. ⁇ Pressurize (finish adhesion). After the treatment, the temperature inside the autoclave is lowered to 50° C. or lower, the pressure is released, and the laminated glass is taken out from the autoclave.
  • the half-wave plate may be arranged in a region where a reflection image is formed, and the half-wave plate may have the same area as the glass plate or may have a smaller area than the glass plate. good.
  • each is composed of a glass composition containing silicon oxide, iron oxide, and alkali metal oxide in the composition.
  • Glass plate 1 total iron oxide content: 0.483% by mass, FeO content 0.193% by mass
  • glass plate 2 total iron oxide content: 0.358% by mass, FeO content 0.130% by mass
  • glass plate 3 total iron oxide content: 0.065 mass%, FeO content 0.028 mass
  • glass plate 4 total iron oxide content: 2.055 mass%, FeO content
  • the laminated body was placed in an autoclave, deaerated by a vacuum bag, and then subjected to pressure/heat treatment at about 90° C. and 0.25 MPa for about 10 minutes.
  • Laminated glass was manufactured by combining these.
  • Double-image evaluation method As a light source, a linear polarizing plate (SHLP44 manufactured by Meitan Imaging Co., Ltd.) so as to be S-polarized light is placed on the screen of iPad Pro (registered trademark) (A1670 manufactured by Apple Inc.), and then white The lattice-shaped image was projected as projection light on the indoor side of the laminated glass at an incident angle of 56°, and the projection light emitted from the laminated glass to the indoor side was visually evaluated whether a double image could be visually recognized.
  • the evaluation criteria were ⁇ (no visual recognition, or faint visual recognition but no problem in actual use), and ⁇ (clear visual recognition).
  • the landscape of the outdoor side was observed through the laminated glass, and a visual evaluation was performed to see if it could be visually recognized without any problem.
  • the evaluation criteria were ⁇ (the outdoor scenery could be visually recognized without any problem) and ⁇ (the outdoor scenery could not be visually recognized).
  • Example 1 When the laminated glass in which the two glass plates were the glass plates 1 (total iron oxide content: 0.483% by mass) was visually evaluated, no double image was visually recognized. For this reason, the evaluation was ⁇ (a level that was not visually recognized at all or was faintly visible but there was no problem in actual use). Further, when the landscape of the outdoor side was observed through the laminated glass from the indoor side of the laminated glass, it could be visually recognized without any problem. Therefore, the evaluation was rated as ⁇ .
  • Example 2 When the laminated glass in which the two glass plates were glass plates 2 (total iron oxide content: 0.358 mass %) was visually evaluated, no double image was visually recognized. For this reason, the evaluation was ⁇ (a level that was not visually recognized at all or was faintly visible but there was no problem in actual use). Further, when the landscape of the outdoor side was observed through the laminated glass from the indoor side of the laminated glass, it could be visually recognized without any problem. Therefore, the evaluation was rated as ⁇ .
  • Example 3-1 As a laminated glass which is a glass plate having a different total iron oxide content converted to Fe 2 O 3 , a glass plate 3 (total iron oxide content: 0.065% by mass) on the first glass plate (inside the room), A laminated glass in which the glass plate 2 (total iron oxide content: 0.358 mass%) was used as the second glass plate (outside the room) was prepared, and double images were evaluated. Upon visual evaluation, a double image was slightly visible, but there was no problem in actual use. For this reason, the evaluation was ⁇ (a level that was not visually recognized at all or was faintly visible but there was no problem in actual use). Further, when the landscape of the outdoor side was observed through the laminated glass from the indoor side of the laminated glass, it could be visually recognized without any problem. Therefore, the evaluation was rated as ⁇ .
  • Example 3-2 Contrary to Example 3-1, the glass plate 2 (total iron oxide content: 0.358% by mass) on the first glass plate (inside the room) and the glass plate 3 (total on the outside) in the second glass plate (outside).
  • a laminated glass using the total iron oxide content: 0.065% by mass) was prepared, and double images were evaluated. Upon visual evaluation, a double image was slightly visible, but there was no problem in actual use. For this reason, the evaluation was ⁇ (a level that was not visually recognized at all or was faintly visible but there was no problem in actual use). Further, when the landscape of the outdoor side was observed through the laminated glass from the indoor side of the laminated glass, it could be visually recognized without any problem. Therefore, the evaluation was rated as ⁇ .
  • Example 3-1 uses glass (glass plate 3) having a low total iron oxide content for the first glass plate (inside the room). It was confirmed that the projected light was clearly visible as compared with Example 3-2. This is presumably because the transparency of the projection light behind the first glass plate was high due to the low total iron oxide content, and the projection light was clearly visible. Further, in Examples 3-1 and 3-2, the transparency as a laminated glass was higher than that in Examples 1 and 2, and the projection light was clearer than in Examples 1 and 2. Among the present Examples 1, 2, 3-1, 3-2, Example 3-1 showed the clearest projection light.
  • HUD device that improves a double image in projection light projected on a windshield of a vehicle such as an automobile.

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  • Engineering & Computer Science (AREA)
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Abstract

La présente invention concerne un dispositif d'affichage tête haute qui est monté sur un corps mobile et permet à un occupant du corps mobile de reconnaître visuellement une image virtuelle sur la base d'une image de réflexion de lumière polarisée S sur une unité de projection, le dispositif d'affichage tête haute comprenant : une unité d'imagerie pour diffuser une lumière de projection composée de lumière polarisée S ; et une unité de projection pour projeter la lumière de projection, l'unité de projection est constituée d'un verre feuilleté comprenant une première plaque de verre disposée sur le côté incident de la lumière de projection, une seconde plaque de verre disposée sur le côté émission de la lumière de projection, et une lame demi-onde disposée entre la première plaque de verre et la seconde plaque de verre, la première plaque de verre et la seconde plaque de verre sont constituées d'une composition de verre contenant de l'oxyde de silicium, de l'oxyde de fer et de l'oxyde de métal alcalin, la première plaque de verre et/ou la seconde plaque de verre présentent une épaisseur de 0,3 à 3 mm, la composition de verre contient de 0,2 à 2,0 % en masse d'oxyde de fer total en termes de Fe2O3 et de 0,1 à 0,5 % en masse de FeO, la lame demi-onde est transparente à la lumière visible, la lumière transmise à travers la lame demi-onde présente une valeur d'a* de -2,5 à 4,5 et une valeur de b* de -1,0 à 7,0 dans le système de couleur CIE, l'image de réflexion est formée sur la surface côté intérieur de la première plaque de verre, et la lumière de projection convertie en lumière polarisée P est émise à partir de la surface côté extérieur de la seconde plaque de verre.
PCT/JP2020/002406 2019-02-19 2020-01-23 Dispositif d'affichage tête haute WO2020170711A1 (fr)

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JP2021501749A JP7328575B2 (ja) 2019-02-19 2020-01-23 ヘッドアップディスプレイ装置
EP20759650.3A EP3895928B1 (fr) 2019-02-19 2020-01-23 Dispositif d'affichage tête haute
CN202080012302.4A CN113365868A (zh) 2019-02-19 2020-01-23 平视显示器装置
US17/431,619 US20220050289A1 (en) 2019-02-19 2020-01-23 Head-up display device

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JP2019-027407 2019-12-10

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